25 October 1996 Nonvolatile holographic storage methods
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We demonstrate the storage of 1000 holograms in LiNbO3:Fe, recorded at 488 nm and read at 633 nm to reduce decay during read-out. We minimize Bragg mismatch problems of the two-wavelength scheme by using thin crystals, while combining peristrophic and angle multiplexing to counter the poorer angular selectivity of thin crystals. We find the reduction in read-out decay to be significant, but limited by dark conductivity.
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Ernest Chuang, Ernest Chuang, Demetri Psaltis, Demetri Psaltis, } "Nonvolatile holographic storage methods", Proc. SPIE 2849, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications II, (25 October 1996); doi: 10.1117/12.255466; https://doi.org/10.1117/12.255466

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